Galaxies 2013, 1, 1-5; doi:10.3390/galaxies1010001 OPEN ACCESS galaxies ISSN 2075-4434 www.mdpi.com/journal/galaxies Editorial Galaxies: An International Multidisciplinary Open Access Journal Emilio Elizalde Consejo Superior de Investigaciones Científicas, Instituto de Ciencias del Espacio & Institut d’Estudis Espacials de Catalunya, Faculty of Sciences, Campus Universitat Autònoma de Barcelona, Torre C5-Parell-2a planta, Bellaterra (Barcelona) 08193, Spain; E-Mail:
[email protected]; Tel.: +34-93-581-4355 Received: 23 October 2012 / Accepted: 1 November 2012 / Published: 8 November 2012 The knowledge of the universe as a whole, its origin, size and shape, its evolution and future, has always intrigued the human mind. Galileo wrote: “Nature’s great book is written in mathematical language.” This new journal will be devoted to both aspects of knowledge: the direct investigation of our universe and its deeper understanding, from fundamental laws of nature which are translated into mathematical equations, as Galileo and Newton—to name just two representatives of a plethora of past and present researchers—already showed us how to do. Those physical laws, when brought to their most extreme consequences—to their limits in their respective domains of applicability—are even able to give us a plausible idea of how the origin of our universe came about and also of how we can expect its future to evolve and, eventually, how its end will take place. These laws also condense the important interplay between mathematics and physics as just one first example of the interdisciplinarity that will be promoted in the Galaxies Journal. Although already predicted by the great philosopher Immanuel Kant and others before him, galaxies and the existence of an “Island Universe” were only discovered a mere century ago, a fact too often forgotten nowadays when we deal with multiverses and the like.